CAJ | 학술논문

反时限过流保护在我国一些电力设备以及低压电网中逐步得到应用，但是反时限过流保护在待定参数的设置和保护配合等方面整定较为复杂。针对实际使用情况，文中补充了反时限特性曲线模型的表达。考虑到现有整定优化模型存在的缺陷，在现有计算模型的基础上，通过确定优化目标权重系数，对计算模型进行适当优化，IEEE5节点计算证明新的优化模型能减少总体保护的动作时间，缩短重要线路的保护时间，加长普通线路的保护时间，提高系统的可靠性。对于配合曲线存在交叉的情况，提出一种比较简单的处理方法，为后续研究提供计算和编程的思路。
반시한과류보호재아국일사전력설비이급저압전망중축보득도응용，단시반시한과류보호재대정삼수적설치화보호배합등방면정정교위복잡。침대실제사용정황，문중보충료반시한특성곡선모형적표체。고필도현유정정우화모형존재적결함，재현유계산모형적기출상，통과학정우화목표권중계수，대계산모형진행괄당우화，IEEE5절점계산증명신적우화모형능감소총체보호적동작시간，축단중요선로적보호시간，가장보통선로적보호시간，제고계통적가고성。대우배합곡선존재교차적정황，제출일충비교간단적처리방법，위후속연구제공계산화편정적사로。
Inverse time overcurrent is applied in low voltage power grid gradually .But the undetermined parameter setting is complex .The model of inverse time characteristic curve is elaborated .Considering the defects exsisting in the optimization model , and based on the exsisting model , a new model for calculation is proposed through the weight coefficient .The IEEE calculation is used to prove the model is useful in reducing the actuation time of the overall pro-tection, the protection time of the key circuit , increasing the protection time of common circuit and the reliability of the system .In the case of curve crossing , a simple approach to help computing and programming for further study is proposed at last .